package com.hwl.ucenter.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.hwl.ucenter.pojo.Member;

/**
 * <p>
 * 会员表 Mapper 接口
 * </p>
 *
 * @author long
 * @since 2021-10-07
 */
public interface MemberMapper extends BaseMapper<Member> {

    /**
     * 获取某一天注册的人数
     */
    Integer selectRegisterNumByDay(String day);

}
